Could not create directory.
/var/www/wordpress/wp-content/upgrade/stats.tmp/stats

Actions: Return to Plugin Installer

At first I thought I had to setup an FTP account but searched more and I found some information that says that I need to change the permissions of the wp-content folder which is located in the directory:

/var/www/wordpress/wp-content

I tried changing it by doing:

sudo chmod -R 777 wp-content/

but when I tried installing a plugin I got the same error message. I also tried passing it 755 as a permission but still got the same thing. I settled on 755 because it is more secure I have read.